| 引用本文: | 尹 栋,欧阳金鑫,李 昂,等.兼顾电压支撑的V2G充电站自适应故障穿越控制方法[J].电力系统保护与控制,2026,54(02):116-126.[点击复制] |
| YIN Dong,OUYANG Jinxin,LI Ang,et al.Adaptive fault ride-through control method for V2G charging stations with voltage support capability[J].Power System Protection and Control,2026,54(02):116-126[点击复制] |
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| 摘要: |
| 车网互动(vehicle to grid, V2G)模式的充电站可为电网运行提供有效支持。但在电网故障下，直流侧不平衡功率可能使得充电站直流电压越限，造成充电站被从电网切除。直接切除使充电站无法在故障期间为电网提供支撑，并导致短时间内启停而危害站内电力电子器件。为此，刻画了避免直流电压与交流电流越限的充电站功率边界，建立了计及故障持续时间的充电站故障穿越功率可行域。分析发现了故障穿越功率可行域随故障持续时间增加而缩减的特征，提出了避免充电站直流电压越限的极限故障时间计算方法。并解析了避免交流电流与直流电压越限的充电站最大电压支撑点。通过考虑极限故障时间与电网保护动作时间的关系，提出了兼顾电压支撑的充电站自适应故障穿越控制方法。仿真验证表明，该方法能够根据不同故障严重程度采取应对措施，在保障充电站安全的同时最大程度支撑并网点电压。 |
| 关键词: 电动汽车充电站 放电模式 故障穿越 电压支撑 功率可行域 |
| DOI：10.19783/j.cnki.pspc.250306 |
| 投稿时间：2025-03-24修订日期：2025-06-16 |
| 基金项目:国家重点研发计划项目资助(2023YFB2406800)；国网重庆市电力公司市南分公司科技项目资助(SGCQSN 00YJJS2400426) |
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| Adaptive fault ride-through control method for V2G charging stations with voltage support capability |
| YIN Dong1,2,OUYANG Jinxin1,LI Ang1,2,WANG Jian1,ZHAO Xinzhe1 |
| (1. State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, Chongqing 400044, China;
2. Shinan Power Supply Branch of State Grid Chongqing Electric Power Company, Chongqing 401336, China) |
| Abstract: |
| Charging stations operating in the vehicle-to-grid (V2G) mode can provide effective support for power system operation. However, under grid fault conditions, unbalanced power on the DC side may cause the DC voltage of the charging station to exceed its limits, leading to the disconnection of the charging station from the grid. However, direct disconnection prevents the charging station from supporting the grid during faults and may result in frequent short-term start-stop operations, thereby endangering the power electronic devices within the charging station. To address this issue, the power boundaries of charging stations that avoid DC voltage and AC current limit violations are characterized, and a fault ride-through power feasible region considering fault duration is established. The analysis reveals that the fault ride-through power feasible region shrinks as the fault duration increases, and a method for calculating the critical fault duration that avoids DC voltage limit violations is proposed. Furthermore, the maximum voltage support point of the charging station that avoids AC current and DC voltage limit violations is analytically derived. By considering the relationship between the critical fault duration and grid protection action times, an adaptive fault ride-through control method of charging stations with voltage support capability is proposed. Simulation results show that the proposed method can adopt to different fault conditions, ensuring charging station safety while maximizing voltage support at the point of common coupling. |
| Key words: electric vehicle charging station V2G fault ride-through voltage support power feasible region |
